Robot cleaner



FIG. 1 is a perspective view of a robot cleaner showing our new design.

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines illustrating portions of the robot cleaner are for environmental purposes only and form no part of the claimed design. 

CLAIM We claim the ornamental design for a robot cleaner, as shown and described. 